13112116661 has 8 divisors (see below), whose sum is σ = 14985991680. Its totient is φ = 11238420528.

The previous prime is 13112116603. The next prime is 13112116669. The reversal of 13112116661 is 16661121131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13112116661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112116669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206300 + ... + 262266.

It is an arithmetic number, because the mean of its divisors is an integer number (1873248960).

Almost surely, 2^13112116661 is an apocalyptic number.

It is an amenable number.

13112116661 is a deficient number, since it is larger than the sum of its proper divisors (1873875019).

13112116661 is an equidigital number, since it uses as much as digits as its factorization.

13112116661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89443.

The product of its digits is 1296, while the sum is 29.

Adding to 13112116661 its reverse (16661121131), we get a palindrome (29773237792).

The spelling of 13112116661 in words is "thirteen billion, one hundred twelve million, one hundred sixteen thousand, six hundred sixty-one".